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efficacious

see definition of efficacious
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Synonyms for efficacious

adj efficient, productive
  • effective
  • effectual
  • active
  • adequate
  • capable
  • competent
  • energetic
  • influential
  • operative
  • potent
  • powerful
  • puissant
  • serviceable
  • strong
  • successful
  • useful
  • virtuous

Antonyms for efficacious

  • impotent
  • incapable
  • unproductive
  • useless
  • weak
  • inefficacious
  • inefficient
  • unsuccessful
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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